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H5P.set_deflate

Set compression method and compression level

Syntax

H5P.set_deflate(plist_id,level)

Description

H5P.set_deflate(plist_id,level) sets the compression method for the dataset creation property list specified by plist_id to H5D_COMPRESS_DEFLATE. level specifies the compression level as a value from 0 and 9, inclusive. Lower values results in less compression.

Examples

Create a two dimensional double precision dataset that has an initial size of [512 1024], but is also unlimited in both dimensions and has a chunk size of [512 1024] and a compression level of 5.

fid = H5F.create('myfile.h5');
type_id = H5T.copy('H5T_NATIVE_DOUBLE');
unlimited = H5ML.get_constant_value('H5S_UNLIMITED');
dims = [512 1024];
h5_dims = fliplr(dims);
h5_maxdims = [unlimited unlimited];
space_id = H5S.create_simple(2,[1024 512],h5_maxdims);
dcpl = H5P.create('H5P_DATASET_CREATE');
chunk_dims = [512 1024];
h5_chunk_dims = fliplr(chunk_dims);
H5P.set_chunk(dcpl,h5_chunk_dims);
H5P.set_deflate(dcpl,5);
dset_id = H5D.create(fid,'DS',type_id,space_id,dcpl);
H5D.close(dset_id);
H5F.close(fid);
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